Installing uzumibi-cli

To start developing with Uzumibi, you first need to install uzumibi-cli and its prerequisite tools.

Prerequisites

The following tools must be installed beforehand.

Rust Toolchain

The Rust compiler is required to build Uzumibi projects. Install it using rustup:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

After installation, add the WASM target:

rustup target add wasm32-unknown-unknown

Verify the version:

$ rustc --version
rustc 1.93.1 (01f6ddf75 2026-02-11)

Node.js and pnpm

For Cloudflare Workers, Node.js is required for development and deployment with Wrangler.

# Installing Node.js (example using a version manager)
# With fnm
fnm install --lts
# With nvm
nvm install --lts

# Installing pnpm
npm install -g pnpm

Verify the versions:

$ node --version
v25.6.1

$ pnpm --version
10.29.3

Wrangler CLI

A CLI tool used for developing and deploying Cloudflare Workers. It will be automatically installed locally via pnpm install after project creation, but installing it globally can be convenient:

pnpm install -g wrangler

clang / Build Tools

The C compiler clang is required for building the mruby compiler (mruby-compiler2).

For macOS:

xcode-select --install

For Linux:

# Ubuntu/Debian
sudo apt-get install clang build-essential

# Fedora
sudo dnf install clang